Beater and mixer



Dec; 12, 1939. E. R. HACMAC BEATER AND MIXER Filed May'l, 1938 /ll 6 l/,MIIIIIIII i llllllllll patented ec. 122. 193.9

i maar PATENT OFFICE BEATER AND MIXER Edward R. Hacmac, Hollywood,Calif., assignor to Na-Mac Products Corporation, Hollywood,

Calif., a corporation of California Application May 16, 1938, Serial No.208,132

1 Claim.

The present invention relates to a novel construction of beater andmixer and more particularly to a novel gearing and operating mechanismproviding a dual speed arrangement.

Among the objects of the present invention is the provision of a novelgearing arrangementl for an interdigitating beater and mixerl soconstructed and combined as to provide quick adjustment for differentspeeds as required in the operation of the device.

A further object is to provide a novel operating mechanism for aportable and manually operable interdigitating beater and mixer havingadjustable means for varying the speed of operation.

A still further object of the present invention is the provision of anovel speed change mechanism for a beater and mixer and comprising apair of intermeshing gears and pinions differing in size and adapted forrotation in xed planes, and an adjustable gear having a gear face oneach of its sides adapted for engagement with its complementary orrespective pinion.

Further objects, advantages and capabilities Will be apparent from thedisclosure or are inherent in the device.

In the drawing:

Fig. 1 is a View in side elevation of my beater and mixer.

Fig. 2 is a fragmentary View in vertical cross section of the adjustableshaft and common drive gear of Fig. 1.

Fig. 3 is a fragmentary view in side elevation of an alternate form ofgearing or operating 35 mechanism.

Referring more particularly to the disclosures in Figs. 1 and 2 of thedrawing, there is disclosed a novel construction of mixer and beaterprovided with a skeleton or cutaway frame I in which are rotatablymounted driven shafts 2 and 3 having secured to their lower ends theusual interdigitating beaters or mixers 4 and 5, respectively. Securedor pinned to the shaft 2 adjacent its upper end is a gear 6 having afixed bevel gear or pinion 1 on its upper surface. The gear 6 mesheswith a gear 8 secured or keyed on the shaft 3, and this gear 8 hassecured on its upper surface a bevel gear or pinion 9. The bevel gearsor pinions 'I and 9 are shown of different diameters for the purpose ofsecuring different speeds of rotation of the driven gears 6 and 8 andtheir respective shafts and beaters.

Rotatably mounted in bearings formed in the skeleton frame I is arotatable drive shaft IIJ having secured on its outer end a handle IIfor novel manual rotation. The horizontal portion I2 of the shaft Il) islongitudinally slidable in these bearings and sec-ured or keyed to thisshaft is a gear I3 having gear faces I4 and i5 on its opposite sideswith the teeth of the face I4 adapted to be moved into meshingv-engagement with the bevel gear or pinion l, whilethe teeth of the faceI5 are adapted to be moved into meshing engagement with the teeth on thebevel gear 8. Thus, it will be apparent that When the teeth on thefaceI4 are in meshing engagement with the teeth on the bevel gear orpinion l, this gear i3 will drivethe bevel gear or pinion l, gear Ii andgear 8 so as to rotate the shafts 2 and 3 and their respective beatersIl and 5 in opposite directions.

In order to retain the bevel drive gear I3 in meshing engagement Withthe gear or pinion 'l or with the gear or pinion 9, means are providedfor locking the shaft I2 in either position of adjustment. 'Ihis isaccomplished by means of a pair of spaced annular racesr I6 and Ilformed in the shaft adapted to interlock with a spring pressed ball ordetent I8. This ball or detent will permit ready manual shifting of theshaft but prevent accidental displacement or separa- `tion of theintermeshing bevel gears after the bevel gear I3 has been moved intointermeshing engagement with either of the gears or pinions 'I and 9.

In Fig. 3 there is disclosed an alternate construction of bevel gear orpinion Iiia mounted upon a raised hub ilEL formed on or secured to thegear 8. In order to drive this bevel gear or pinion I 6a, the beveldrive gear I8a is provided with a gear face I9 adjacent its peripheryand which is adapted to mesh with the bevel gear cr pinion 'lv While theopposite gear face 2@ is provided with bevel teeth of lesser radiusadapted to be moved into meshing engagement with the bevel gear orpinion I 6B.

In order to securely hold the beaters or mixers in a position foroperation, the invention ccmprehends a handle 2I suitably attached orthreaded to a projection 22 providing suflicient clearance between thehandle and the frame for the insertion of the hand of the user. So thatthe beaters 4 and 5 do not Contact or scrape upon the bottom of a bowlor other container, I provide a U-shaped member or stirrup 23 extendingbeyond the lower ends of the beaters so as to space and maintain them adistance from the bottom of the container.

I claim: ,Y

In a beater and mixer having a supporting frame, a drive shaft providedwith an operating L55 on the driven shafts, spaced annular races on thedrive shaft, and a spring pressed member in the frame adapted to belocked in one or the other of said races to automatically maintain thedrive shaft gear in engagement with one or the other 5 of the drivenshaft pinions.

EDWARD R. HACMAC

